It's best to lay out your makeup as you would when planning your outfit. If you're using a brightening primer, then be judicious with your use of shimmer and sparkly things. I like to play with texture a bit, so you can always find a balance.
Tim QuinnMost blue-based colors help make the smile appear whiter and have the added benefit of making you look younger... Shimmering nude gloss also works well if bright pops of color are not your thing.
Tim Quinn